Twelve studies find that overall gains in charter schools are larger than other public schools; four find charter schools’ gains higher in certain significant categories of schools; six find comparable gains; and, four find that charter schools’ overall gains lagged behind traditional schools.
Source: Charter School Achievement: What We Know, July 2005 Update
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http://www.nber.org/~schools/charterschoolseval/
This federally-funded report compares the performance of New York City students who were accepted at charters through a random lottery to students who were rejected (lotteried-in vs. lotteried-out). Researchers found that NYC charter schools performed better than traditional public schools and teach a much higher percentage of minority students. Charter students gained about an extra 12 percent of a performance level in math each year over the comparison group. In reading, the growth was approximately an extra 3.5 percent each year. Charters in the city served a larger percentage of Hispanic and black children, and charter school applicants were less likely to be white or Asian than the average New York City public school student.
Date: 2007
Source: National Bureau of Economic Research
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